Astronomy 100—Exam 2
... C. giant stars have lifetimes that are very short compared to the main sequence stage. D. elements heavier than helium are relatively rare. E. none of the above. 34. If the rate of hydrogen fusion within the Sun were to decrease, the core of the Sun would A. contract and decrease in temperature. D. ...
... C. giant stars have lifetimes that are very short compared to the main sequence stage. D. elements heavier than helium are relatively rare. E. none of the above. 34. If the rate of hydrogen fusion within the Sun were to decrease, the core of the Sun would A. contract and decrease in temperature. D. ...
Infinity Express
... Patterns of the motion of the sun, moon, and stars in the sky can be observed, described, and predicted. (By end of grade 2). The sun is a star that appears larger and brighter than other stars because it is closer. Stars range greatly in their distance from Earth. (By end of grade 5). Patterns of t ...
... Patterns of the motion of the sun, moon, and stars in the sky can be observed, described, and predicted. (By end of grade 2). The sun is a star that appears larger and brighter than other stars because it is closer. Stars range greatly in their distance from Earth. (By end of grade 5). Patterns of t ...
Life Cycle of a Star - Intervention Worksheet
... After a low or medium mass or star has become a red giant the outer parts grow bigger and drift into space, forming a cloud of gas called a planetary nebula. The blue-white hot core of the star that is left behind cools and becomes a white dwarf. The white dwarf eventually runs out of fuel and dies ...
... After a low or medium mass or star has become a red giant the outer parts grow bigger and drift into space, forming a cloud of gas called a planetary nebula. The blue-white hot core of the star that is left behind cools and becomes a white dwarf. The white dwarf eventually runs out of fuel and dies ...
Visual Photometry - El Camino College
... human eye can detect stars brighter than about 6th magnitude when in a very dark site (far from city lights). Unfortunately, around El Camino, the eye can barely see 4th magnitude stars due to all of the light pollution from the surrounding LA city lights. However, with the additional light collecti ...
... human eye can detect stars brighter than about 6th magnitude when in a very dark site (far from city lights). Unfortunately, around El Camino, the eye can barely see 4th magnitude stars due to all of the light pollution from the surrounding LA city lights. However, with the additional light collecti ...
visual photometry - El Camino College
... human eye can detect stars brighter than about 6th magnitude when in a very dark site (far from city lights). Unfortunately, around El Camino, the eye can barely see 4th magnitude stars due to all of the light pollution from the surrounding LA city lights. However, with the additional light collecti ...
... human eye can detect stars brighter than about 6th magnitude when in a very dark site (far from city lights). Unfortunately, around El Camino, the eye can barely see 4th magnitude stars due to all of the light pollution from the surrounding LA city lights. However, with the additional light collecti ...
Stars are made of very hot gas. This gas is mostly hydrogen and
... than the sun, to only a couple of times smaller. Because of their small size these stars burn their fuel very slowly, which allows them to live a very long time. Some red dwarf stars will live trillions of years before they run out of fuel Why are red dwarf stars red? Because red dwarf stars only bu ...
... than the sun, to only a couple of times smaller. Because of their small size these stars burn their fuel very slowly, which allows them to live a very long time. Some red dwarf stars will live trillions of years before they run out of fuel Why are red dwarf stars red? Because red dwarf stars only bu ...
PHYS-638-07f: Problem set #0 Solutions
... Remembering that the brightest stars are around magnitude zero, we see that the sun would still be a very bright star, about 10,000 times brighter than the brightest actual star! (Since m=-10 is 10 magnitudes brighter than m=0, and each difference of 5 in magnitude represents a factor 100 in brightn ...
... Remembering that the brightest stars are around magnitude zero, we see that the sun would still be a very bright star, about 10,000 times brighter than the brightest actual star! (Since m=-10 is 10 magnitudes brighter than m=0, and each difference of 5 in magnitude represents a factor 100 in brightn ...
Chapter 10. Stellar Spectra
... diagrams. For example, the optically visible lines in Helium also arise from excited states, but the energy needed to excite those states is much higher than the energy needed to get HI to the n=2 level. Hence, Helium is often hard to see in stars. Only the hottest stars (O and B stars) show lines o ...
... diagrams. For example, the optically visible lines in Helium also arise from excited states, but the energy needed to excite those states is much higher than the energy needed to get HI to the n=2 level. Hence, Helium is often hard to see in stars. Only the hottest stars (O and B stars) show lines o ...
Transcript - Chandra X
... Slide 7: More detailed information about the H-R diagram will be presented further along. Since the presentation of the deep sky objects includes their spectral class and luminosity classes, the H-R diagram terminology is given here for those unfamiliar with H-R diagrams. The H-R diagram is a plot ...
... Slide 7: More detailed information about the H-R diagram will be presented further along. Since the presentation of the deep sky objects includes their spectral class and luminosity classes, the H-R diagram terminology is given here for those unfamiliar with H-R diagrams. The H-R diagram is a plot ...
but restricted to nearby large stars
... • It expressed the width of certain absorption lines in the star's spectrum. • It has been shown that this feature is a general measure of the size of the star, and thus of the total luminosity output from the star. ...
... • It expressed the width of certain absorption lines in the star's spectrum. • It has been shown that this feature is a general measure of the size of the star, and thus of the total luminosity output from the star. ...
Andromeda Check-List - Norman Lockyer Observatory
... Best viewed through moderate sized telescopes but still worth searching out through any binoculars or telescopes. This compact cluster lies south of Herschel’s Garnett Star and what makes it interesting is that it is cocooned in a very large and bright nebula NGC7142 – Open Cluster – II 2 r – Modera ...
... Best viewed through moderate sized telescopes but still worth searching out through any binoculars or telescopes. This compact cluster lies south of Herschel’s Garnett Star and what makes it interesting is that it is cocooned in a very large and bright nebula NGC7142 – Open Cluster – II 2 r – Modera ...
October 2014 - Newbury Astronomical Society
... Sun its outer layers would extend to half way between the orbits of Mars and Jupiter. It is so big that it is the only star that can be seen as a disc using giant telescopes. However the surface temperature is cool for a star at 3100°K when compared with the brighter surface of our Sun at 5500°K and ...
... Sun its outer layers would extend to half way between the orbits of Mars and Jupiter. It is so big that it is the only star that can be seen as a disc using giant telescopes. However the surface temperature is cool for a star at 3100°K when compared with the brighter surface of our Sun at 5500°K and ...
How Bright is that star?
... Luminosity is the amount of energy a star gives off as light. Measured in Watts or Solar Units or “Sols” However for all practical purposes Absolute magnitude and Luminosity of a star measure the same thing. Absolute Magnitude Approximate Luminosity ...
... Luminosity is the amount of energy a star gives off as light. Measured in Watts or Solar Units or “Sols” However for all practical purposes Absolute magnitude and Luminosity of a star measure the same thing. Absolute Magnitude Approximate Luminosity ...
S1E4 Extreme Stars
... What is a planetary nebula? (1) A large swarm of planets surrounding a star. (2) A disk of gas and dust around a young star. (3) Glowing gas in Earth’s upper atmosphere. (4) Ionized gas around a white dwarf star. ...
... What is a planetary nebula? (1) A large swarm of planets surrounding a star. (2) A disk of gas and dust around a young star. (3) Glowing gas in Earth’s upper atmosphere. (4) Ionized gas around a white dwarf star. ...
HR Diagram and Stellar Fusion
... their lives. They are subclassified as Ia or Ib, with Ia representing the brightest of these stars. These stars are very rare - 1 in a million stars is a supergiant. The nearest supergiant star is Canopus (F0Ib) 310 light years away. Some other examples are Betelgeuse (M2Ib), Antares (M1Ib) and Rige ...
... their lives. They are subclassified as Ia or Ib, with Ia representing the brightest of these stars. These stars are very rare - 1 in a million stars is a supergiant. The nearest supergiant star is Canopus (F0Ib) 310 light years away. Some other examples are Betelgeuse (M2Ib), Antares (M1Ib) and Rige ...
Astronomy Homework - Life
... fusion burning shells of (hydrogen then helium/helium then hydrogen). 16. The red giant will next become a (supergiant/white dwarf). 17. The eventual fate of all stars depends upon the (mass/composition) of the star when it first formed. ...
... fusion burning shells of (hydrogen then helium/helium then hydrogen). 16. The red giant will next become a (supergiant/white dwarf). 17. The eventual fate of all stars depends upon the (mass/composition) of the star when it first formed. ...
Main-sequence stars - Stellar Populations
... Main-sequence stars are fusing hydrogen into helium in their cores like the Sun Luminous mainsequence stars are hot (blue) Less luminous ones are cooler (yellow or red) ...
... Main-sequence stars are fusing hydrogen into helium in their cores like the Sun Luminous mainsequence stars are hot (blue) Less luminous ones are cooler (yellow or red) ...
The Birth of Stars
... The cloud spins faster and faster, until it can’t support itself, and flattens out partly into a disk ...
... The cloud spins faster and faster, until it can’t support itself, and flattens out partly into a disk ...
common constellations
... Members of the Underground Railroad were fully aware of the predicament of fleeing slaves. About 1831 the Railroad began to send travelers into the South to secretly teach slaves specific routes they could navigate using Polaris. By the beginning of the Civil War in 1861, about 500 people a year wer ...
... Members of the Underground Railroad were fully aware of the predicament of fleeing slaves. About 1831 the Railroad began to send travelers into the South to secretly teach slaves specific routes they could navigate using Polaris. By the beginning of the Civil War in 1861, about 500 people a year wer ...
Chapter 19 Star Formation
... Star formation begins in massive clouds of molecular gas and dust Star formation happens when part of a dust cloud begins to contract under its own gravitational force; as it collapses, the center becomes hotter and hotter until nuclear fusion begins in the core. That is a basic and simple summary ...
... Star formation begins in massive clouds of molecular gas and dust Star formation happens when part of a dust cloud begins to contract under its own gravitational force; as it collapses, the center becomes hotter and hotter until nuclear fusion begins in the core. That is a basic and simple summary ...
Chapter 19 Star Formation
... Star formation begins in massive clouds of molecular gas and dust Star formation happens when part of a dust cloud begins to contract under its own gravitational force; as it collapses, the center becomes hotter and hotter until nuclear fusion begins in the core. That is a basic and simple summary ...
... Star formation begins in massive clouds of molecular gas and dust Star formation happens when part of a dust cloud begins to contract under its own gravitational force; as it collapses, the center becomes hotter and hotter until nuclear fusion begins in the core. That is a basic and simple summary ...
Answers for the HST Scavenger Hunt
... Define this term. The spherical outer boundary of a black hole. Once matter crosses this threshold, the speed required for it to escape the black hole’s gravitational grip is greater than the speed of light. When scientists used the HST to study Cygnus X-1, they were able to observe two of these eve ...
... Define this term. The spherical outer boundary of a black hole. Once matter crosses this threshold, the speed required for it to escape the black hole’s gravitational grip is greater than the speed of light. When scientists used the HST to study Cygnus X-1, they were able to observe two of these eve ...
Corona Australis
Corona Australis /kɵˈroʊnə ɒˈstreɪlɨs/ or Corona Austrina /kɵˈroʊnə ɒˈstraɪnə/ is a constellation in the Southern Celestial Hemisphere. Its Latin name means ""southern crown"", and it is the southern counterpart of Corona Borealis, the northern crown. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The Ancient Greeks saw Corona Australis as a wreath rather than a crown and associated it with Sagittarius or Centaurus. Other cultures have likened the pattern to a turtle, ostrich nest, a tent, or even a hut belonging to a rock hyrax.Although fainter than its namesake, the oval- or horseshoe-shaped pattern of its brighter stars renders it distinctive. Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4.1. Epsilon Coronae Australis is the brightest example of a W Ursae Majoris variable in the southern sky. Lying alongside the Milky Way, Corona Australis contains one of the closest star-forming regions to our Solar System—a dusty dark nebula known as the Corona Australis Molecular Cloud, lying about 430 light years away. Within it are stars at the earliest stages of their lifespan. The variable stars R and TY Coronae Australis light up parts of the nebula, which varies in brightness accordingly.